Usage History of 'allantoin'

The following chart shows how frequently 'allantoin' appeared in printed materials over time. For example, the word 'allantoin' occurred 6 times in books in 1839 and 1,019 times in 2008. From 1839 to 2008, the word 'allantoin' was used a total of 62,474 times in books scanned by Google. See Reference: Google Ngram project.

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